Potassium Carbonate → 3-(3-Chloro-benzyloxy)-phthalic acid dimethyl ester

HRID 1690429Notes

Reaction equation

HRID 1690429 reaction equation
[CH3:1][O:2][C:3](=[O:15])[C:4]1[C:5](=[C:10]([OH:14])[CH:11]=[CH:12][CH:13]=1)[C:6]([O:8][CH3:9])=[O:7].C(=O)([O-])[O-].[K+].[K+].[Cl:22][C:23]1[CH:24]=[C:25]([CH:28]=[CH:29][CH:30]=1)[CH2:26]Br>CC(C)=O>[CH3:1][O:2][C:3](=[O:15])[C:4]1[C:5](=[C:10]([O:14][CH2:26][C:25]2[CH:28]=[CH:29][CH:30]=[C:23]([Cl:22])[CH:24]=2)[CH:11]=[CH:12][CH:13]=1)[C:6]([O:8][CH3:9])=[O:7]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 698381-(Bromomethyl)-3-chlorobenzeneHCID 12223651Dimethyl 3-hydroxyphthalate

Product 1

HCID 669065853-(3-Chloro-benzyloxy)-phthalic acid dimethyl esterYield 92%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

To a stirred suspension of 3-hydroxyphthalic acid dimethyl ester (1.3 g, 6.3 mmol) in acetone (20 mL) and potassium carbonate (2.1 g, 15.2 mmol) was added 3-chlorobenzyl bromide (1.0 mL, 7.6 mmol) and refluxed overnight. The solvent was evaporated and the residue was partitioned between water (100 mL) and ethyl acetate (150 mL), and washed with water (2×100 mL). The combined organic phases was dried, concentrated and purified by flash column chromatography (EtOAc/Hexane) to give 3-(3-chloro-benzyloxy)-phthalic acid dimethyl ester (1.9 g, 92% yield). The product was used in the next step without further purification.

Workup

  1. temperaturerefluxed overnight
  2. customThe solvent was evaporated
  3. customthe residue was partitioned between water (100 mL) and ethyl acetate (150 mL)
  4. washwashed with water (2×100 mL)
  5. customThe combined organic phases was dried
  6. concentrationconcentrated
  7. custompurified by flash column chromatography (EtOAc/Hexane)

Sources & evidence

ORD record
ord-7fd3c685b4ee4d4ea73e26f1485a09f4
Source dataset
uspto-grants-2012_04
Patent number
US08153659B2

Reaction notes

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